#有一个列表 里面有数字 找到唯一不重复的数字 [1,2,3,3,2,4,5,1,5]



# list1 = [1,2,3,3,2,4,5,1,5]
# list2 = list(set(list1))
# for i in list2:
#     c = 0
#     for j in list1:
#         if j == i:
#             c += 1
#     if c == 1:
#         print(i)
#

# h = 100
# n = int(input('几次:'))
# a = 0
# for i in range(n):
#     a += h / 3
#     h  = h / 3
# print(h, a)

import time
# list = []
# s = time.time()
# for i in range(1,1000001):
#     list.append(i)
# a = time.time()
# print(a-s)

# x = time.time()
# list1 = [i for i in range(1,1000001)]
# p = time.time()
# print(p-x)

